Abstract: Objective：To determine the reliability and validity of Chinese Communication Function Classification System (CFCS, Fudan). Methods：Inclusion criteria: Children diagnosed as cerebral palsy aged from 2 to 18 years and preschool children with communication disorders(PCCD) in Children's Hospital of Fudan University and Shanghai Dong Li Feng Mei Health School from May to October 2017. Exclusion criteria: Children with severe hearing and visual impairments and families with nonChinese communication. Several pediatricians and rehabilitation therapists in the study group translated, retranslated, collectively discussed and formed the Chinese CFCS(Fudan) according to the English original translation. While the SLP was performing onsite CFCS, the caregivers who were given the process retrospectively assessed CFCS, relatively the one who took more care was the first caregiver and less for the second caregiver. The interrater reliability of the CFCS was determined by analyzing the correlation between the results of a SLP and a caregiver and the results of a caregiver and a caregiver. Pediatric Evaluation of Disability Inventory (PEDI) as a parallel validity test was assessed by the caregivers for children or children's main teachers at school. By analyzing the correlation of the SLP's CFCS levels and the scales of the PEDI social function items, the validity of CFCS was determined. Results：139 Children were involved in the research, 91 males and 48 females, aged between 2.0 and 15.8 (4.7 ± 3.2) years, 74 cases (53.2%) were from 2 to 4 years old and 65 cases were from 4 to 16 years old. 80 children with cerebral palsy were assessed by GMFCS, 47 were assessed by MACS, and 59 of 139 children were PCCD. The SLP assessed the all 139 children involved in the research. At least one caregiver in 102/139 (73.4%) families participated in the CFCS assessments, 2 caregivers in 48/102 (47.1%) families participated in the CFCS assessments. Overall reliability: Kw values between a SLP and a caregiver, the first and second caregiver were 0.83, 0.85. 55 children of 102 participants involved in CFCS assessments were cerebral palsy, of them 2 caregivers in 20 families participated in the CFCS assessments, Kw values between a SLP and a caregiver, the first and second caregiver were 0.88, 0.86. 47 children were PCCD, of them 2 caregivers in 28 families participated in the CFCS assessments, Kw values between a SLP and a caregiver, the first and second caregiver were 0.85, 0.82. As to the CFCS of Children aged 2 to 4 years, Kw value between a SLP and a caregiver was 0.77, and the first and second caregiver was 0.90. The CFCS of Children aged 4 to 16 years, Kw value between a SLP and a caregiver was 0.87, and the first and second caregiver was 0.74. 139 participants' correlation coefficient between the SLP's CFCS levels and the scales of the PEDI social function items was - 0.81.Conclusion：The Chinese CFCS(Fudan) has good reliability and parallel validity among children with cerebral palsy and PCCD, and can effectively classify the communication function of these children.